This right handed vertical ergonomic wireless mouse allows your right hand, arm and shoulder to be placed in a more natural position. The vertical design and button placement provide better support and reduce muscle strain in the forearm and wrist. Providing better ergonomic support which makes long hours of computer work more comfortable. Attain higher precision with your choice of adjustable DPI levels. Simply switch between 3 different DPI levels, ranging from DPI 800, 1200 to 1600. Connect this ergonomic mouse plug & play by the supplied USB nano receiver which ranges up to 30ft/10m. The on/off switch helps save power of the two standard AAA batteries included.